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Proceedings Paper

Method of high-speed process study in experiments with thin foils heated by high-brightness laser radiation
Author(s): A. V. Koutsenko; Ivan G. Lebo; A. A. Matzveiko; Yu. A. Mikhailov; Vladislav B. Rozanov; G. V. Sklizkov; A. N. Starodub
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Paper Abstract

The results of the experiments at the installation 'PICO' with thin foils heating by laser radiation pulses of nanosecond duration are reported. The Al foils with thickness in the range from 3 (mu) up to 40 (mu) where used as a targets. The flux density was varied from 1013 W/cm2 to 1014 W/cm2. The sharp dependence of the portion of laser energy passed through the target on foil thickness was observed. This phenomena was accompanied by relatively small decrease of the passed radiation pulse duration. The anomalously high speed burning through of thin foil was observed in these experiments and the conclusion on possible mechanism of this phenomena has been done on the base of comparison of experimental data with theoretical calculations. The observed phenomena can be interpreted on the base of conjecture about the local burning through of a target in the small areas at the target surface with much more values of flux density than average one and following laser radiation self-focusing and formation of 'hot spots.'

Paper Details

Date Published: 22 June 1999
PDF: 7 pages
Proc. SPIE 3516, 23rd International Congress on High-Speed Photography and Photonics, (22 June 1999); doi: 10.1117/12.350555
Show Author Affiliations
A. V. Koutsenko, P.N. Lebedev Physical Institute (Russia)
Ivan G. Lebo, P.N. Lebedev Physical Institute (Russia)
A. A. Matzveiko, P.N. Lebedev Physical Institute (Russia)
Yu. A. Mikhailov, P.N. Lebedev Physical Institute (Russia)
Vladislav B. Rozanov, P.N. Lebedev Physical Institute (Russia)
G. V. Sklizkov, P.N. Lebedev Physical Institute (Russia)
A. N. Starodub, P.N. Lebedev Physical Institute (Russia)

Published in SPIE Proceedings Vol. 3516:
23rd International Congress on High-Speed Photography and Photonics
Valentina P. Degtyareva; Mikhail A. Monastyrski; Mikhail Ya. Schelev; Alexander V. Smirnov, Editor(s)

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